feat: initial commit — BMAD tooling, Claude memories, firmware scaffold

Adds the complete project foundation:
- BMAD BMM workflow tooling (_bmad/)
- Claude slash commands, skills, and project memories (.claude/)
- ESP32 firmware scaffold (PlatformIO + Waveshare e-ink driver)
- .gitignore excluding _bmad-output/ and .pio/ build artifacts

Planning artifacts (PRD, architecture, epics) are intentionally not
tracked — they live in _bmad-output/ per project convention.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

_bmad/bmm/workflows/3-solutioning/create-epics-and-stories/templates/epics-template.md

@@ -0,0 +1,57 @@
+---
+stepsCompleted: []
+inputDocuments: []
+---
+
+# {{project_name}} - Epic Breakdown
+
+## Overview
+
+This document provides the complete epic and story breakdown for {{project_name}}, decomposing the requirements from the PRD, UX Design if it exists, and Architecture requirements into implementable stories.
+
+## Requirements Inventory
+
+### Functional Requirements
+
+{{fr_list}}
+
+### NonFunctional Requirements
+
+{{nfr_list}}
+
+### Additional Requirements
+
+{{additional_requirements}}
+
+### FR Coverage Map
+
+{{requirements_coverage_map}}
+
+## Epic List
+
+{{epics_list}}
+
+<!-- Repeat for each epic in epics_list (N = 1, 2, 3...) -->
+
+## Epic {{N}}: {{epic_title_N}}
+
+{{epic_goal_N}}
+
+<!-- Repeat for each story (M = 1, 2, 3...) within epic N -->
+
+### Story {{N}}.{{M}}: {{story_title_N_M}}
+
+As a {{user_type}},
+I want {{capability}},
+So that {{value_benefit}}.
+
+**Acceptance Criteria:**
+
+<!-- for each AC on this story -->
+
+**Given** {{precondition}}
+**When** {{action}}
+**Then** {{expected_outcome}}
+**And** {{additional_criteria}}
+
+<!-- End story repeat -->